Where are all the aliens? A new book explores possible answers
Seven Rasmussen, an astrobiologist and author of the new book Cloudy with a Chance of Starships , gives readers a tour of the astonishing science behind modern searches for alien life
In the new book "Cloudy with a Chance of Starships," astrobiologist and author Seven Rasmussen invites readers on an exploration of the science behind the search for extraterrestrial life. The book delves into the Drake equation, a seven-factor formula devised by astronomer Frank Drake in 1961 to estimate the likelihood of extraterrestrial civilizations.
Rasmussen explains that the equation begins with well-known factors like the rate of star formation in the galaxy, then moves into more complex elements such as the percentage of planets that could potentially support intelligent life, and concludes with the uncertain average lifetime of a civilization. The author highlights the interdisciplinary nature of astrobiology, noting that it encompasses aspects of astronomy, biology, chemistry, geology, physics, engineering, and more.
The most common phrases uttered by exoplanet scientists are often curse words, but it's their determination to uncover the truth that sets them apart. When searching for alien life, researchers look for biosignatures, evidence of past or present life such as fossils or atmospheric gases, and technosignatures, indicators of technological civilizations like artificial structures or radio signals.
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